Symbol	Ba	Atomic radius: pm	217	Fusion: kJ/Mole	7.12
Name	Barium	Ionic radius: pm	(+2)142	Boiling point: °C	1897
Atomic number	56	Electron affinity	0.15	Melting point: °C	727
Atomic weight	137.3	1st  ion potential	5.21	Specific Heat Cap: J/(g K)	0.20
Classification	Alk earth metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.18
Configuration	[Xe]6s2	Crystal structure	BCC	Electrical Cond	0.03
Oxidation states	2	Density	3.62	Abundance: mg/kg-crust	425
Electronegativity	0.89	Vaporization: kJ/Mole	140.0
Barium was discovered in other compounds in 1774 by Carl Wilhelm Scheele.  It was isolated by Sir Humphrey Davy in 1808.			Uses - x-ray imaging agent, glassmaking, making rubber, rat poison